CN101554764A

CN101554764A - Product having injection molded portion, method of manufacturing the product, and apparatus for manufacturing the product

Info

Publication number: CN101554764A
Application number: CNA2009101326337A
Authority: CN
Inventors: 田村达也
Original assignee: Tokai Kogyo Co Ltd
Current assignee: Tokai Kogyo Co Ltd
Priority date: 2008-04-07
Filing date: 2009-03-30
Publication date: 2009-10-14
Anticipated expiration: 2029-03-30
Also published as: US8123995B2; JP2009248448A; US20090252969A1; CN101554764B; JP4947661B2

Abstract

The present invention provides a molded product of continuously and smoothly jointing exposed face of an already-formed member and an injection molding member, and a manufacturing method thereof. The invention also provides an injection molding mold for the method and an apparatus for manufacturing the molding mold. Additionally, a method of manufacturing a molded product provided with an injection molded portion of this invention includes (a) a step of preparing an injection molding mold provided with a spill cavity and placing an already-formed member (first formed member) at a predetermined position in the injection molding mold, (b) a step of closing the mold, injecting liquid molding material, which has been heated and melted, into the molding cavity from an injection gate and filling the molding cavity, (c) a step of maintaining the molding material for a predetermined period of time while it is pressed into contact with an exposed surface of the first molded member, and (d) a step of separating and removing molding material, which spills into the spill cavity and solidifies, from the molded product.

Description

The moulding product and manufacture method and the manufacturing installation that possess injection moulding portion

Technical field

The present invention relates to moulding product and manufacture method thereof that a part has injection moulding portion.In addition, the present invention relates to injecting molding die that in above-mentioned manufacture method, uses and the manufacturing installation that possesses this mould.

Background technology

As automobile exterior parts, use to be called the long shape moulding product that vehicle roof decoration bar, sealing strip, windowpane run channel etc. possess various shape of cross sections.A kind of as this long shape moulding product, can enumerate and comprise thermoplastic forming polymer materials such as thermoplastic resin material or thermoplastic elastic material are shaped to the profiled part of microscler shape and the moulding product by injection moulding injection moulding portion of moulding and joint on the part of the length direction of this profiled part by methods such as extrusion modlings.As making this method that has the moulding product of injection moulding portion on a part, known have a for example method shown in the patent documentation 1.

Patent documentation 1: TOHKEMY 2002-12038 communique

But in the manufacture method of patent documentation 1 record, the profiled part (being " extrusion modling portion " in the patent documentation 1) that is shaped to long shape might be insufficient with the bond strength of the boundary face of injection moulding portion (being " mould molding portion " in the patent documentation 1).That is, the injection moulding portion that is injected into the molten condition in the chamber of injecting molding die forms in the forming polymer material is during the surface (being the composition surface) that arrives molded parts as the other moulding of joint object (below be also referred to as " first profiled part ") and is cooled.The viscosity of this forming polymer material raises thereupon, and injection pressure also reduces.Consequently, keep moulding material hot fully and pressure can not arrive the surface of these molded parts in order to engage with the injection moulding portion that is formed by above-mentioned forming polymer material as the surface (surface of exposing in the chamber) of the molded parts (first profiled part) that engage object, easily peel off on the composition surface of portion of injection moulding as a result and molded parts.

Particularly, desire with the regulation injection moulding portion join to have thickness relative thin, taper in shape of cross section part (for example, during the projection protuberance) first profiled part, be formed with in the injecting molding die that contains corresponding to the forming cavity in the space of the taper shape of this first profiled part in inside, maintenance forming polymer material hot fully and pressure is difficult to arrive the end to this taper space, and the joint in this taper part becomes more difficult.In addition, even engage, also may produce a plurality of small be full of cracks (that is the disengaged part of microcosmic) that naked eyes can not observed degree.If slowly enlarging then final boundary portion (composition surface), these be full of cracks peel off.Further, when above-mentioned be full of cracks produces, also can significantly damage ornamental (for example attractive in appearance) on part that can be visual.

Summary of the invention

Therefore, the present invention proposes for the above-mentioned existing issue in the manufacturing that solves the moulding product that joint injection moulding portion forms on the part of molded parts.Its purpose is, provide will keep till the face fully the injection moulding portion of heat and pressure to form up to exposing of molded parts being filled in the forming cavity with the forming polymer material, and the manufacture method of exposing the moulding product that face and the injection moulding portion that is formed by this forming polymer material can fully engage of these molded parts and these moulding product that pass through this manufacture method manufacturing.In addition, another object of the present invention is to, injecting molding die that can carry out this joint and the manufacturing installation that possesses this mould are provided.

By in order to address the above problem the present invention who proposes, provide the manufacture method of the moulding product that a part has injection moulding portion.Wherein, " part has the moulding product of injection moulding portion " refers to, the moulding product that the parts (molded parts) by moulding in advance such as extrusion modlings engage with injection moulding portion.

When the inventor examines above-mentioned be full of cracks and leads to a phenomenon, this generation reason is studied, found that, in the part of thin and projection such as the above-mentioned protuberance part in forming cavity, the molten polymer moulding material that supplies to this part during injection moulding portion moulding lack to engage in the needed sufficient temperature and pressure at least any one, the result can not get the bond strength that needs.Thereby, further investigate by above-mentioned viewpoint, finish the present invention thus.

In several inventions provided by the invention, the invention of scheme 1 is for using the injecting molding die that can open and close that is formed with the forming cavity of regulation shape in inside, when opening this injecting molding die, first profiled part (molded parts) of other moulding is placed on the interior assigned position of injecting molding die, when closing this injecting molding die, the part of this first profiled part is exposed in this forming cavity, and keep making this expose the state of face as the part of the forming surface of this forming cavity, then, with heating and the thermoplastic polymer moulding material of the state of fusion is filled in this chamber from injection port injection, in moulding injection moulding portion, this of this injection moulding portion and this first profiled part exposed that face engages integratedly and the method for making the moulding product.And manufacture method of the present invention comprises following each operation.

(a) as described injecting molding die, preparation is formed with in the inside of this mould along the direction of exposing the boundary face that face and described injection moulding portion engage of described first profiled part and the direction upper process that separates from described forming cavity, and the operation of the injecting molding die of the discharge side that is communicated with this forming cavity.

(b) will heat and the described moulding material of the liquid state of fusion is filled into the described forming cavity from described injection port injection with the injection pressure of regulation, the operation of the described injection moulding of moulding portion, wherein, make the initial stage arrive described boundary face at least corresponding to the initial stage moulding material of the ormal weight that exposes face of the part of described discharge side, flow in the described discharge side and discharge this later stage moulding material displacement of comparing the low state of temperature height and viscosity with this initial stage moulding material of the part of the initial stage moulding material that this is discharged from by compare injection pressure that the time goes up the later stage moulding material of back injection with the injection of this initial stage moulding material.

(c) keep official hour making described later stage moulding material be crimped onto exposing under the state on the face of described first profiled part, make the pressure of this later stage moulding material and/or hotwork be used for this and expose face, the operation of the described injection moulding portion that engages on the face that this later stage moulding material forms in exposing of this first profiled part.And

(d) moulding material that will be discharged to described discharge side separates the operation of removing from the moulding product of described joint.

In the scheme 1 described manufacture method of above-mentioned formation, by being formed in above-mentioned injecting molding die inside along the direction of exposing the boundary face that face and injection moulding portion engage of first profiled part and the direction upper process that separates from forming cavity, and the discharge side that is communicated with above-mentioned forming cavity, later stage moulding material that can be by comparing the low state of temperature height and viscosity with the initial stage moulding material (promptly, from the injection port follow-up moulding material of injection after the moulding material in the early stage) injection pressure, make above-mentioned initial stage moulding material flow in the discharge side and discharge.In addition, for the part of the initial stage moulding material that is discharged from, can replace with the later stage moulding material.

Therefore, manufacture method according to scheme 1, obtain making having the face that exposes that the later stage moulding material that engages required heat (temperature) and pressure acts on first profiled part, can be to engage injection moulding portion and the above-mentioned effect of exposing face effectively than present stronger intensity.

Further, when initial injection flows in injecting molding die to the initial stage moulding material in the forming cavity, can contain attached to foreign matters such as the small dust in the forming cavity, oil, releasing agents, the existence that can point out these foreign matters is one of reason of bond strength reduction.In the manufacture method of the present invention, the initial stage moulding material of sneaking into above-mentioned foreign matter is owing to the injection pressure by the later stage moulding material is discharged in the discharge side, the part that is discharged from is replaced by the later stage moulding material, therefore can get rid of the initial stage moulding material that causes bond strength to reduce, become the be full of cracks reason.Similarly, exposing dust on the face, oil content etc. and also can be discharged in the discharge side attached to first profiled part.

The invention of scheme 2 is a kind of manufacture method, it is characterized in that, in the manufacture method of scheme 1, described discharge side is communicated with described forming cavity by the throttling flow path portion, and generation is accompanied by the shear heat of shearing the described initial stage moulding material of discharging by this throttling flow path portion.

By the generation of above-mentioned shear heat, can prevent to make the temperature of throttling flow path portion raise, prevent that viscosity from increasing in the temperature reduction of the mobile initial stage moulding material of throttling flow path portion and by conducting heat.Therefore, manufacture method according to scheme 2, except the effect that the manufacture method of scheme 1 is brought, the initial stage moulding material easily is discharged in the discharge side by above-mentioned throttling flow path portion, can fill the expose face of the later stage moulding material of sufficient heat of maintenance and pressure to the first interior profiled part of forming cavity thus.

The invention of scheme 3 is a kind of manufacture method, it is characterized in that, in the manufacture method of scheme 1 or 2, the forming polymer material that use can be applied with the described first profiled part hot melt is as the moulding material of described injection moulding portion, by hot melt apply engage described first profiled part expose face and this injection moulding portion.

Manufacture method according to the scheme 3 of above-mentioned formation, except the effect that the manufacture method of scheme 1 or 2 is brought, obtain to make the effect of exposing face and applying the moulding product that engage securely by the injection moulding portion of above-mentioned forming polymer material formation by hot melt of first profiled part.

The invention of scheme 4 is a kind of manufacture method, it is characterized in that, in the manufacture method of scheme 3, first profiled part is by at least a moulding that is selected from rubber (for example based on EPDM olefines rubber material), olefines synthetic resin, olefin hydrocarbons thermoplasticity elastic body and the styrene analog thermoplastic elastomer, uses olefines synthetic resin or the olefin hydrocarbons thermoplasticity elastic body moulding material as described injection moulding portion.

According to the manufacture method of the scheme 4 of above-mentioned formation, except the effect that the manufacture method of scheme 3 is brought, can use the moulding material that can obtain easily on the market, and can engage well by deposited.

The invention of scheme 5 is a kind of manufacture method, it is characterized in that, in the manufacture method of scheme 1, uses at described described first profiled part that is pre-formed thermal activation type bond layer on the face that exposes.

According to the manufacture method of the scheme 5 of above-mentioned formation, except the effect that the manufacture method of scheme 1 is brought,, can make the moulding product that face and injection moulding portion engage more firmly that expose of first profiled part by giving the bonding agent of thermal activation type.In addition, even use moulding material with first profiled part not have compatibility or the material that lacks compatibility during, also can obtain stable joint as the moulding material of injection moulding portion.

The invention of scheme 6 is a kind of manufacture method, it is characterized in that, in the manufacture method of scheme 1, second profiled part (molded parts) that will be different with described first profiled part is on the assigned position that is placed under the state of this first profiled part separation in the described injecting molding die, when closing described injecting molding die, at least a portion of this second profiled part is exposed in this forming cavity, and keep this is exposed the state of face as the part of the forming surface of this forming cavity, in respectively exposing between the face in the described injection moulding of the moulding portion of described first profiled part and second profiled part, connect described first profiled part and second profiled part by this injection moulding portion thus with this injection moulding portion and two components bonding.

Manufacture method according to the scheme 6 of above-mentioned formation, except the effect that the manufacture method of scheme 1 is brought, respectively expose face with what injection moulding portion engaged first profiled part of other moulding and second profiled part, connect, can make the moulding product of multiple shape thus by this injection moulding portion.

The invention of scheme 7 is a kind of manufacture method, it is characterized in that, in the manufacture method of scheme 6, described first profiled part and described second profiled part have the difform face that exposes mutually.

Manufacture method according to the scheme 7 of above-mentioned formation, except the effect that the manufacture method of scheme 6 is brought, can make to engage and have difform first profiled part of face and the moulding product of second profiled part (for example vehicle glass pane guide groove) of exposing mutually with injection moulding portion.

The invention of scheme 8 is a kind of manufacture method, it is characterized in that, in the manufacture method of scheme 6 or 7, described first profiled part and described second profiled part all are long material, and is formed with the described face that exposes on each length direction end.

According to the manufacture method of the scheme 8 of above-mentioned formation, except the effect that the manufacture method of scheme 6 or 7 is brought, use two kinds of long materials and each length direction end to engage with injection moulding portion, connect by injection moulding portion, can easily make the moulding product thus.

The invention of scheme 9 is a kind of manufacture method, it is characterized in that, in the manufacture method of scheme 6 or 7, described first profiled part and described second profiled part are placed to the described separated from one another and face direction that respectively expose face of face of exposing and intersect, and moulding roughly connects into roughly L font by this injection moulding portion with described first profiled part and second profiled part injection moulding portion of L font the time.

Manufacture method according to the scheme 9 of above-mentioned formation, except the effect that the manufacture method of scheme 6 or 7 is brought, can make by injection moulding portion first profiled part and second profiled part are connected into the roughly moulding product of L font (for example vehicle glass pane guide groove).

The invention of scheme 10 is a kind of manufacture method, it is characterized in that, in the manufacture method of scheme 1, described first profiled part is long material, only remove alongst specific length by the part of first profiled part that will grow, the part of this first profiled part is divided into two, and forming alongst keeps two of the predetermined distance subtend to expose face, expose the described injection moulding of moulding portion between the face at these two, and connect the described cutting part of first profiled part by this injection moulding portion.

According to the manufacture method of the scheme 10 of above-mentioned formation, except the effect that the manufacture method of scheme 1 is brought, can be divided into the injection moulding portion of moulding regulation shape on two the part in a part of removing first profiled part.That is, can be manufactured on the long shape moulding product (for example, vehicle with car door opening fringing) of injection moulding portion of the optional position moulding regulation shape of length direction with the corner portion that bends to the L font.

The invention of scheme 11 is a kind of manufacture method, it is characterized in that, in the manufacture method of scheme 1, that uses polymeric material system is squeezed into section bar as described first profiled part.

According to the manufacture method of the scheme 11 of above-mentioned formation, except the effect that the manufacture method of scheme 1 is brought, can easily make and to be shaped to the moulding product that the parts of definite shape use as first profiled part by the extrusion modling cross section.

In addition, to achieve these goals, provide the injecting molding die that can preferably utilize in the method for the moulding product that a manufacturing part disclosed herein has injection moulding portion.Promptly, the invention of scheme 12 is a kind of injecting molding die, this injecting molding die can open and close, when closing, form the forming cavity of regulation shape in inside, wherein, this injecting molding die can be placed into first profiled part of other moulding on the assigned position when opening, the part of first profiled part of described placement is exposed in this forming cavity and under this exposes face and become the state of a part of forming surface of this forming cavity, this first profiled part can be fixed, described injecting molding die comprises: to the direction of exposing face along described first profiled part, and from the direction upper process of described forming cavity separation, and the discharge side that is communicated with this forming cavity; The thermoplastic polymer moulding material of the state of fusion is expelled to the injection port in the described chamber with heating, when this injection port is injected described forming polymer material, can make the initial stage arrive in the initial stage moulding material of the described ormal weight that exposes face at least corresponding to the initial stage moulding material of the part of described discharge side, flow in the described discharge side and discharge this later stage moulding material displacement of comparing the low state of temperature height and viscosity with this initial stage moulding material of the part of the initial stage moulding material that this is discharged from by compare injection pressure that the time goes up the later stage moulding material of back injection with the injection of this initial stage moulding material.

According to the injecting molding die of the scheme 12 of above-mentioned formation, disclosed manufacture method in the embodiment 1 can make injection moulding portion engage with the face that exposes of above-mentioned first profiled part effectively aptly.

Further, when the initial stage moulding material flows in injecting molding die, even when having imported attached to foreign matters such as the small dust in the forming cavity, oil, releasing agents, because the initial stage moulding material is discharged in the discharge side by the injection pressure of later stage moulding material, so also can get rid of the initial stage moulding material that causes bond strength to reduce.

The invention of scheme 13 is a kind of injecting molding die, it is characterized in that, in the injecting molding die of scheme 12, is provided with the block that exposes the face butt with described first profiled part.

Injecting molding die according to the scheme 13 of above-mentioned formation, except the effect that the injecting molding die of scheme 12 brings, contact with block by the face that exposes that makes first profiled part, first profiled part correctly can be navigated to the position of regulation, what can stably engage first profiled part on correct position exposes face and injection moulding portion.

The invention of scheme 14 is a kind of injecting molding die, it is characterized in that, in the injecting molding die of scheme 12 or 13, described discharge side be communicated with corresponding to the injection moulding portion of moulding in described forming cavity in other parts compare the cavity segment that is shaped to thin part and dispose.

Injecting molding die according to the scheme 14 of above-mentioned formation, except the effect that the injecting molding die of scheme 12 or 13 brings, even the formation in the bonding part of first profiled part and injection moulding portion easily produces in the part of thin part of be full of cracks, also can replace the later stage moulding material of the low state of temperature height and viscosity effectively.

The invention of scheme 15 is a kind of injecting molding die, it is characterized in that, in the injecting molding die of scheme 12, described discharge side forms open the taper that direction side broaden of internal perisporium at mould.

According to the injecting molding die of the scheme 15 of above-mentioned formation, except the effect that the injecting molding die of scheme 12 brings,, can easily take out from mould because extruding and the moulding material that solidifies form taper (or mortar shape) in discharge side.

The invention of scheme 16 is a kind of injecting molding die, it is characterized in that, in the injecting molding die of scheme 12, described discharge side is communicated with this forming cavity by relative with described discharge side phase specific volume little throttling flow path portion with described forming cavity.

Injecting molding die according to the scheme 16 of above-mentioned formation, except the effect that the injecting molding die of scheme 12 brings, because moulding material is during by relative with discharge side phase specific volume little throttling flow path portion with forming cavity, generation is accompanied by the shear heat of shearing, can not reduce the temperature of moulding material in the throttling flow path portion, prevent the rising of viscosity.

The invention of scheme 17 is a kind of injecting molding die, it is characterized in that, in the injecting molding die of scheme 16, the sectional area vertical with this flow direction in the described discharge side of sectional area ratio of the direction that the flow direction with described moulding material in the described throttling flow path portion is vertical is little.

Injecting molding die according to the scheme 17 of above-mentioned formation, except the effect that the injecting molding die of scheme 16 brings, this sectional area by making the sectional area ratio discharge side vertical with flow direction in the throttling flow path portion is little, after the injection moulding of moulding product, take out moulding product and wait when the moulding material of the curing in the discharge side is removed in the separation of moulding product from injecting molding die, can separate easily and can prevent residual tangible cut channel on the moulding product by cutting off.

The invention of scheme 18 is a kind of injecting molding die, it is characterized in that, in the injecting molding die of

scheme

16 or 17, described throttling flow path portion is set at when closing described injecting molding die on the mould with the side of the mould subtend that forms described forming cavity.

Injecting molding die according to the scheme 18 of above-mentioned formation, except the effect that the injecting molding die of

scheme

16 or 17 brings, because after the moulding of moulding product, the connected component that flows into moulding material that the throttling flow path portion solidifies and injection moulding portion forms and the outer surface of injection moulding portion superposed part not, even, can on the moulding product, not produce visible cut channel so be somebody's turn to do the moulding material that solidifies from injection moulding portion cutting and separating yet.

In addition, to achieve these goals, provide and make a part and have the manufacturing installation that can preferably utilize in the method for moulding product of injection moulding portion.

Promptly, the invention of scheme 19 is a kind of manufacturing installation, this device is for using the injecting molding die that can open and close that is formed with the forming cavity of regulation shape in inside, when opening this injecting molding die, place first profiled part of other moulding, when closing this injecting molding die, the part of this first profiled part is exposed in this forming cavity, and keep making this expose the state of face as the part of the forming surface of this forming cavity, then, with heating and the forming polymer material of the state of fusion is filled in this chamber from injection port injection, this of this injection moulding portion and this first profiled part exposed that face engages integratedly in moulding injection moulding portion and the device of making the moulding product, this device comprises: scheme 12 described injecting molding dies; Be expelled in the described chamber with forming polymer material and be arranged on injection port on the described injecting molding die, supply with the moulding material feed unit of the forming polymer material of this molten condition to molten condition in order to heat.

According to the injecting molding die of the scheme 19 of above-mentioned formation, can implement manufacture method of the present invention disclosed herein suitably.

In addition, the present invention is as described in the scheme 20, a kind of moulding product are provided, being fabricated to feature, and on the part of first profiled part of moulding in addition, engaging integratedly the injection moulding portion that obtains by injection moulding is arranged by any one manufacture method disclosed herein.

The moulding product of the scheme 20 of above-mentioned formation are for engaging the injection moulding portion that obtains by injection moulding well on the part of other first profiled part of moulding, and the moulding product of be full of cracks etc.

The invention of scheme 21 is a kind of moulding product, wherein, in the moulding product of scheme 20 record, in the bonding part of described first profiled part and described injection moulding portion, the shape on the composition surface of described first profiled part is identical with the shape on the composition surface of described injection moulding portion.

Moulding product according to the scheme 21 of above-mentioned formation, except the effect that the moulding product of scheme 20 bring, because the composition surface of first profiled part is bonded with each other with identical shape with the composition surface of injection moulding portion, the bonding part does not have jump and forms the junction surface that first profiled part is connected with the edge-smoothing ground of injection moulding portion, can provide outward appearance good moulding product.

The invention of scheme 22 is a kind of moulding product, it is characterized in that, in the moulding product of

scheme

20 or 21, the boundary member of described first profiled part and described injection moulding portion is forming from this first profiled part side to the continuous even surface of this injection moulding portion side.

According to the moulding product of the scheme 22 of above-mentioned formation, except the effect that the moulding product of

scheme

20 or 21 bring,, can provide the moulding product of excellence attractive in appearance because first profiled part engages continuously with the boundary member no concave-convex of injection moulding portion.

The invention of scheme 23 is a kind of moulding product, it is characterized in that, in the moulding product of scheme 20, described first profiled part of described moulding product engages with uniform bond strength with whole composition surfaces of described injection moulding portion.

According to the moulding product of the scheme 23 of above-mentioned formation, except the effect that the moulding product of scheme 20 bring, obtain excellence attractive in appearance, more high-quality moulding product.

The invention of scheme 24 is a kind of moulding product, it is characterized in that, in the moulding product of scheme 20, described first profiled part has the part of attenuation and projection at least a portion of shape of cross section.

In the moulding product of the scheme 24 of above-mentioned formation, except the effect that the moulding product of scheme 20 bring, can provide the moulding product that expose the jut that possesses excellent quality that face and injection moulding portion engage effectively of first profiled part.

Description of drawings

Fig. 1 is the stereogram of the length direction terminal part of the vehicle roof decoration bar in the one embodiment of the present invention;

Fig. 2 is the II-II line cutaway view among Fig. 1;

Fig. 3 is the side view of the vehicle roof decoration bar main part in the one embodiment of the present invention;

Fig. 4 is the IV-IV line cutaway view among Fig. 3;

Fig. 5 is the V-V line cutaway view among Fig. 3;

Fig. 6 is the VI-VI line cutaway view among Fig. 3;

Fig. 7 is the vertical view of the injecting molding die in the one embodiment of the present invention;

Fig. 8 is the VIII-VIII line cutaway view among Fig. 7;

Fig. 9 is the IX-IX line cutaway view among Fig. 7;

Figure 10 is for schematically showing moulding material just after injection port injection is filled in the forming cavity, flow direction, the temperature of the moulding material before being discharged in the discharge side and the figure that acts on the pressure that exposes face;

Figure 11 is for schematically showing with moulding material after the injection port injection is filled into the forming cavity temperature of the moulding material when moulding material is discharged in the discharge side and the figure that acts on the pressure that exposes face;

Figure 12 is the part stereogram of the windowpane run channel in the one embodiment of the present invention;

Figure 13 is the part stereogram of the car door opening fringing in the one embodiment of the present invention.

Symbol description

1 vehicle roof decoration bar, 10 vehicle roof decoration bar main parts (first profiled part), 11 vehicle roof decoration bar main parts expose face, 12 heads, 13a, 13b head end, 14 shanks, 16 extensions, the ora terminalis of 17 vehicle roof decoration bar main parts, 18a, 18b elastic repulsion protuberance, 19 cores, 20 end caps (injection moulding portion), 21 end cap ora terminalis, 22 end cap composition surfaces, 30 injecting molding dies, 32 injecting molding die bed dies, 33 injecting molding die bed die protuberances, 34 injecting molding die molds, 40 forming cavities, 42 injection ports, 44 first profiled part placement sections, 46 throttling flow path portion, 48 discharge sides, 52 blocks, 54 promote 56 running channels, 58 locating rings, 59 injection nozzle, 70 windowpane run channels, 72 windowpane run channels, first profiled part, 74 windowpane run channels, second profiled part, 76 windowpane run channel injection moulding portions, 77 cooperate protuberance, 78 shielding protuberances, 79 sealing protuberances, 80 projection forming parts (windowpane run channel) corresponding to discharge side, 90 car door opening fringings, 92 car door opening fringings, first profiled part, 93 margination part cores, 94 car door opening fringing injection moulding portions, 96 sealing protuberances, 98 margination parts, 99 keep protuberance, the 100 projection forming parts corresponding to discharge side (car door opening fringing)

The specific embodiment

Below preferred implementation of the present invention is described.And, for the necessary item of enforcement of the present invention beyond the item of mentioning especially in this specification, can fully understand as design item based on those skilled in the art of prior art.The present invention can be based on implementing by the technology general knowledge in this specification and the disclosed item of accompanying drawing and this field.

" the moulding product that possess injection moulding portion " made by manufacture method disclosed herein contain and comprise in advance by the one-tenth section bar of moulding such as extrusion modling and the injection moulding portion that engages with its end face (exposing face) and have the moulding product of different shape according to the position that these moulding product are set or purpose.As this moulding product, for example can enumerate, be called the automobile exterior parts of vehicle roof decoration bar, sealing strip, windowpane run channel, car door opening fringing or the parts of building or workpiece etc.

Below, with reference to accompanying drawing a suitable embodiment of the present invention is specifically described, but described explanation does not limit the invention in the invention shown in the drawings.

As the moulding product that possess injection moulding portion, use the vehicle roof decoration bar 1 that is installed on the common vehicle (automobile) to describe.Fig. 1 is the stereogram of the length direction terminal part of the vehicle roof decoration bar 1 in the one embodiment of the present invention.In addition, Fig. 2 is the II-II line cutaway view among Fig. 1.

As shown in Figure 1, the vehicle roof decoration bar 1 in the one embodiment of the present invention is made of vehicle roof decoration bar main part 10 that is shaped to long material by extrusion modling (first profiled part in the present embodiment) and the end cap 20 (the injection moulding portion in the present embodiment) that is formed on the length direction end of this vehicle roof decoration bar main part 10.That is, as shown in Figure 2, vehicle roof decoration bar 1 is face 11 engages moulding with the composition surface 22 of end cap 20 the moulding product that expose of vehicle roof decoration bar main part 10.

Fig. 3 represents the side view of vehicle roof decoration bar main part 10, the cutaway view of each different parts of the vehicle roof decoration bar main part 10 in Fig. 4～6 presentation graphs 3.

As shown in Figure 3 and Figure 4, the shape of cross section of vehicle roof decoration bar main part 10 roughly comprises head 12 (alar part), shank 14 and extension 16.

Head 12 forms to be compared wide with the horizontal width that is arranged on the groove (not shown) on the vehicle that is used to assemble vehicle roof decoration bar 1.In addition, as shown in Figure 6, the thickness of the width center Sm of head 12 part is shaped to the thickest.And, along with top near the width of head 12, the slowly attenuation of S3＞S2＞S1 ground, head end 13a, the 13b of head 12 widths form the thinnest.

On the other hand, as shown in Figure 4, shank 14 forms near 12 the width approximate vertical projection of head 12 relatively of central authorities from the head, and is formed with near the extension 16 that stretches out at two widths respectively from the lower end of this shank 14.On two tops of the width of extension 16, form

elastic repulsion protuberance

18a, 18b respectively integratedly.

And, corresponding to the shape of the assembled portion of the vehicle of assembling vehicle roof decoration bar 1, can be as described later the part of this vehicle roof decoration bar main part 10 of excision on whole length directions in advance, be shaped to required shape.In addition, in the exposing on the face 11 by the injection moulding moulding and engage end cap 20 of the top of the vehicle roof decoration bar main part 10 after cut-out part, moulding possesses the vehicle roof decoration bar 1 of the end of not damaging vehicle appearance thus.

On the other hand, the end cap 20 as injection moulding portion in the present embodiment is the parts on the length direction end that is formed on panel main part 10.Shown in the profilograph of the vehicle roof decoration bar of Fig. 2, it is shaped to the parts that the corner portion of L font, periphery roughly has mild curve for the vertical section, engages smoothly with the face 11 that exposes of the head 12 of vehicle roof decoration bar main part 10.In addition, the shape on the composition surface (exposing face) 11 of vehicle roof decoration bar main part 10 is identical with the shape on the composition surface 22 of end cap 20, and as shown in Figure 1, vehicle roof decoration bar main part ora terminalis 17 engages smoothly continuously with end cap ora terminalis 21.So this boundary member forms from vehicle roof decoration bar main part 10 to the continuous even surface of end cap 20 sides.

Fig. 7 is the vertical view of injecting molding die that is used for the vehicle roof decoration bar 1 of moulding one embodiment of the present invention.In addition, Fig. 8 and Fig. 9 are respectively VIII-VIII line, the IX-IX line cutaway view among Fig. 7.Followingly make the method for above-mentioned vehicle roof decoration bar 1, but the invention is not restricted to mode shown in the drawings with reference to Fig. 7～Fig. 9 and with an example explanation of suitable manufacture method of the present invention.

In addition, the manufacture method that possesses by the moulding product of injection moulding provided by the invention portion comprises following operation: (1) prepares to possess the injecting molding die of discharge side, and molded parts (first profiled part) are placed on the assigned position of injecting molding die; (2) closing molding is with heating and the liquid condition shaping material of fusion is filled into the forming cavity from injection port injection; (3) keep official hour, engage injection moulding portion on the face making moulding material be crimped onto exposing under the state on the face of first profiled part in exposing of first profiled part; And (4) will be discharged in the discharge side and the moulding material that solidifies from the separation of moulding product and remove.As long as it is possess these operations, identical with common injection moulding, can comprise other various operations.Typically say, comprise operation that injecting molding die is heated and/or the operation of cooling off, open the operation of mould taking-up goods, supply with the operation of moulding material etc. from injection device to mould.

And, can use and possess in order to implement device that above-mentioned manufacture method uses as the injection nozzle 59 (with reference to Fig. 8) of the unit of the moulding material of supplying with injection moulding portion and the common injection (mo(u)lding) machine of injecting molding die described later 30.Therefore, can use the common injection (mo(u)lding) machine of injection devices such as mold closing mechanisms such as comprising toggle formula, hydraulic type and spiral, plunger type.

At first, realize that to being suitable for the injecting molding die of the manufacture method of moulding product among the present invention describes.

Injecting molding die 30 among the present invention comprises a pair of

mould

32,34 that can open and close, and is used to insert the locating ring 58 of the injection nozzle 59 of Coinjection molding apparatus.A pair of

mould

32,34 is made of fixed bed die 32 and the movable mold 34 that forms the forming cavity 40 of regulation by closing molding in inside.And, as Fig. 7～shown in Figure 9, when the bed die 32 of this injecting molding die 30 is gone up closing molding with the inner surface (divisional plane) of mold 34, roughly form running channel 56, injection port 42, forming cavity 40, discharge side 48 and throttling flow path portion 46 respectively.And, be provided with placement section 44 with this forming cavity 40 adjacency, placement vehicle roof decoration bar main part 10.In addition, bed die 32 is provided with and is used for being placed into correct locational block 52 (locator protrusions) when placing vehicle roof decoration bar main part 10.

And " mold " that uses in this specification and " bed die " are not to be limited by shape especially for the term of a pair of mould component parts that constitutes the injecting molding die that can form required chamber in inside is described.The mould that will comprise the Die and mould plate of fixation side usually is called bed die, will comprise that the mould of the Die and mould plate of movable side is called mold, but is not limited to this mode.

Injecting molding die 30 in the present embodiment comprises as being used for heating and the liquid polymer moulding material of fusion is expelled to the running channel 56 and the injection port 42 in the path in this forming cavity 40.This injection port 42 with position that discharge side 48 separates on be arranged on bed die 32 sides (with reference to Fig. 8) of forming cavity 40.Thus, at the forming polymer material of injected with heated and the end cap 20 of moulding, the vestige of injection port be in can't be visual the position.

In addition, at injecting molding die 30, on mold 34, be formed with forming cavity 40 when closing this mould 30, to form the end cap 20 (injection moulding portion) of regulation shape.By the moulding material formation end cap 20 that is filled in this forming cavity 40 and solidifies.

Then, in this injecting molding die 30, be provided with along the direction of exposing the boundary face that face 11 and end cap 20 engage of vehicle roof decoration bar main part 10 and to the direction projection of separating from above-mentioned forming cavity 40, and the discharge side 48 that is communicated with forming cavity 40.In addition, this discharge side 48 is communicated with forming cavity 40 parts corresponding to the thin part of head end 13a, the 13b of the vehicle roof decoration bar main part 10 of moulding in the above-mentioned forming cavity 40 and disposes.

And discharge side 48 is preferably provided in the taper that the direction side broadens of opening of injecting molding die 30.This is owing to can easily take out the moulding material that extruding is solidified in discharge side 48 from injecting molding die 30.

Above-mentioned discharge side 48 disposes by the throttling flow path portion 46 that is communicated with forming cavity 40.This throttling flow path portion 46 preferably only forms the groove shape on the divisional plane of bed die 32, have than forming cavity 40 and discharge side 48 relative little volumes.And, the cross-sectional area of the throttling flow path portion 46 of the direction vertical with the flow direction of moulding material be expelled to forming cavity 40 from injection port 42 in form relatively less than with discharge side 48 the vertical sectional area of flow direction.

Thus, when moulding material flows in the throttling flow path portion 46 with said structure, produce shear heat and moulding material is heated.Its result, the rising of the viscosity of the moulding material by shear heat heating is inhibited, and successfully is expressed in the discharge side 48.In addition, the moulding material that solidifies in discharge side 48 can easily separate from the moulding product in the part that is equivalent to the little throttling flow path portion 46 of sectional area.

And discharge side 48 and throttling flow path portion 46 are preferably formed in and are formed on the mould of side of mould subtend of die cavity 40.In the present embodiment, discharge side 48 and throttling flow path portion 46 are formed on the bed die 32.Thus, from moulding product cutting and separating and when removing in discharge side 48 moulding material that solidifies, the moulding material that flows into throttling flow path portion 46 and solidify forms and the outer surface of the end cap 20 of moulding in forming cavity 40 superposed part (rear side of end cap 20) not, so even after cutting and separating, do not produce yet can be from the outside visible cut channel.

Here, as first profiled part that engages with injection moulding portion, can use for example original extrusion modling parts of polymeric material system for not having the parts of feature of the present invention.In addition, above-mentioned extrusion modling parts can use the profiled part by present known various extrusion modling manufactured so long as the identical long shape profiled part of cross section gets final product.Therefore, except the profiled part that to be whole first profiled part form with a kind of moulding material moulding, even every part uses different moulding materials to carry out the coextruded profiled profiled part that obtains, also restriction especially.

As the polymeric material of first profiled part, for example can enumerate rubber, thermoplastic elastomer (TPE) (TPE) or thermoplasticity synthetic resin elastomeric polymers such as (for example PVC).Particularly, the preferred use with EPDM is the soft rubber (solid rubber) of main body or the extrusion modling parts of olefin hydrocarbons thermoplasticity elastic body (TPO), styrene analog thermoplastic elastomer (TPS) or olefines synthetic resin etc.

And, shown in Fig. 1～5, in order to keep intensity and,, all to bury flat core 19 (typically being the light sheet of steel or stainless steel system) underground on the length direction in the width substantial middle of shank in order to allow the elongation in the particular range and to stop the elongation that surpasses above-mentioned scope.

On the other hand, as the preferred moulding material of injection moulding portion, can enumerate the polymer that can apply with the polymeric material hot melt of first profiled part that engages.For example, can use the moulding material (elastomeric polymer moulding material) identical, as long as perhaps can then can use different forming polymer materials by hot melt deposited (having compatibility) with above-mentioned first profiled part.

As the forming polymer material that can hot melt applies, can enumerate forming polymer material based on rubber, thermoplastic elastomer (TPE) (TPE) or thermoplasticity synthetic resin etc.Consider from the viewpoint that closely is filled into easily small thin part that particularly the systematicness height, volume that is preferably molecular structure be crystalline polymer material closely easily.

Preferred example as above-mentioned crystalline polymer, can enumerate polyethylene (PE), polypropylene resins for universal use such as (PP), engineering resins such as polyamide (PA), polyacetals (POM), polybutylene terephthalate (PBT) (PBT), polymethylpentene (TPX), polyphenylene sulfide (PPS), polyether-ether-ketone (PEEK), polytetrafluoroethylene (PTFE).Particularly be preferably low resin viscosity, the PP that obtains good flowability, POM, PA, PBT, PPS, the PEEK etc. of maintenance under the molten condition.

In addition, consider environment, be preferably the resin that does not contain halogens such as chlorine, consider to be fit to olefin hydrocarbons thermoplasticity elastic body (TPO) from viewpoints such as reuses.As hard segment, can enumerate the polyethylene (PE), polypropylene (PP) of olefines, poly--1-amylene etc.In addition, as above-mentioned soft chain segment, can use natural rubber (NR), ethylene propylene rubber (EPM), propylene diene rubber (EPDM), styrene butadiene ribber (SBR), butadiene rubber (BR), butyl rubber (IIR), acrylonitrile-butadiene rubber (NBR), chloroprene rubber (CR) etc.Can contain two or more polymer as hard segment, too for soft chain segment.

Then, with reference to accompanying drawing a suitable embodiment of implementing the manufacture method of moulding product of the present invention is described.But the present invention is not limited to the mode shown in this concrete example.

Vehicle roof decoration bar main part 10 is cut into as Fig. 3～shape shown in Figure 6, form engage with end cap 20 expose face 11.At first, as shown in Figure 5,, contain whole extensions 16 excisions of

elastic repulsion protuberance

18a, 18b in an end of the length direction of vehicle roof decoration bar main part 10.Further, the top of length direction part as shown in Figure 6, only stays head 12 from whole shanks 14 excision bottoms.Therefore, the face 11 that exposes of vehicle roof decoration bar main part 10 becomes head 12 sections.The section of head 12 as mentioned above, the thickness of width center Sm part is shaped to the thickest, along with the top near the width of head 12, with the slow attenuation of order of S3＞S2＞S1.Thus, head end 13a, the 13b of head 12 widths have and become the thinnest and the shape of projection.

And, though not shown, also excise whole extension 16 in another end of length direction, further at top part complete resection shank 14.

Then, open injecting molding die 30, with this vehicle roof decoration bar main part 10 of excision expose face 11, be the exposing that face 11 engages integratedly with the composition surface 22 of end cap 20 of the head 12 and face 11 that exposes of vehicle roof decoration bar main part 10 is exposed in the end face side of forming cavity 40 and places.At this moment, if shift the section of vehicle roof decoration bar main part 10 onto on the protuberance 33 that is arranged on the bed die 32 placement, then can prevent position skew (with reference to Fig. 8).

Further, touch with the vehicle roof decoration bar main part 10 that cuts off and be connected on the block 52 that exposing of vehicle roof decoration bar main part 10 be provided with on the face 11 by the face 11 that exposes that makes vehicle roof decoration bar main part 10, the forming cavity 40 that exposes face 11 relative moulds 30 and the discharge side 48 of vehicle roof decoration bar main part 10 correctly can be located and are placed on the position of regulation, in subsequent handling, can engage the composition surface 22 (with reference to Fig. 7, Fig. 8) of exposing face 11 and end cap 20 of vehicle roof decoration bar main part 10 on correct position stability ground.

Then, after placing vehicle roof decoration bar main part 10 on the placement section 44 of bed die 32, close the mold 34 of movable side, with heating and the moulding material of the liquid state of fusion from injection port 42 injections and be filled into the forming cavity 40.

Figure 10 schematically shows heating and the flow direction of the thermoplastic, polymeric materials of the fusion moulding material (hereinafter referred to as the initial stage moulding material) after just in injection port 42 is expelled to forming cavity 40, the figure that exposes the temperature (Tm, T3, T2, T1) on the face 11 and act on the pressure (Pm, P3, P2, P1) that exposes face 11.And, the flow direction of the vector representation initial stage moulding material in the forming cavity 40, the vector representation moulding material that exposes face 11 that starts from vehicle roof decoration bar main part 10 is to the size of the pressure that exposes face.In addition, the site part is represented the stop place of the initial stage moulding material of this moment.

At first, the liquid thermoplastic forming polymer material that is heated to the temperature T m more than the melt temperature is expelled in the forming cavity 40 from injection port 42 by the injection pressure of running channel 56 with regulation.Being expelled to initial stage moulding material in the forming cavity 40, be with injection port 42 that the center is extended to general radial in forming cavity 40 mobile.The initial stage moulding material that is extended to general radial exposes face 11 from the width middle body of injection beginning arrival vehicle roof decoration bar main part 10 in part second～several seconds (or it below).After this, the cavity segment that exposes head end 13a, the 13b (with reference to Fig. 6) of the width of face 11 towards formation lentamente flows.

The initial stage moulding material is captured heat owing to be injected into pattern tool 30 in the way of flowing, arrive vehicle roof decoration bar main part 10 expose face 11 time forming polymer material temperature lower than the temperature of the position of injection port 42.In addition, the moulding material viscosity that temperature reduces raises, and flowability also reduces.Therefore, formation is lower than temperature T m, T3, the T2 of other parts apart from the temperature T 1 of the moulding material in the cavity segment of injection port 42

head end

13a, 13b farthest.

Further, form in the cavity segment of

head end

13a, 13b, because along with temperature reduces the pressure loss that viscosity raises and causes, moulding material arrive vehicle roof decoration bar main part 10 expose face 11 time pressure also reduce, with each pressure P m, P3 of other parts, the pressure minimum that P2 compares P1.

Its result, because in Fig. 5 and the S1 part that is equivalent to

head end

13a, 13b shown in Figure 6, (Sm, S3, S2) is in a ratio of thin shape with other parts, in above-mentioned thin part, the forming polymer material does not have the needed heat of joint, this external pressure also reduces, and therefore is difficult to spread all over the top to thin.

Figure 11 is for schematically representing the forming polymer material further then is expelled to the forming cavity 40 from injection port 42 with arrow, and the pressure (Pm, P13, P 12, P11) that exposes face 11 effects of the moulding material (hereinafter referred to as later stage moulding material) of initial stage moulding material when being expressed in the discharge side 48 and the figure that exposes the temperature (Tm, T13, T12, T11) on the face 11.And the length that starts from the arrow that exposes face 11 of vehicle roof decoration bar main part 10 is represented vector, and the later stage moulding material is represented with the length of arrow length the pressure and temperature that exposes face 11.In addition, the site part is represented the stop place of the initial stage moulding material that temperature reduces.

During the initial stage moulding material of cavity segment that arrive to form above-mentioned

head end

13a, 13b can flow before curing, go up the injection pressure of the low later stage moulding material of the temperature height of back injection and viscosity by the time, be extruded in the discharge side 48.At this moment, by producing shear heat in the moulding material that is discharged from by volumetric ratio forming cavity 40 and discharge side 48 little throttling flow path portion 46.Thus, the temperature of the moulding material by throttling flow path portion 46 raises, and initial stage moulding material viscosity reduces thereupon, successfully is discharged in the discharge side 48.

In addition because near the initial stage moulding materials that expose the face 11 of vehicle roof decoration bar main part 10 are extruded in the discharge side 48, vehicle roof decoration bar main part 10 expose face 11 and near, the initial stage moulding material is replaced into the later stage moulding material.Therefore, this moment, the temperature (T11, T12, T13) of each several part raise respectively by the later stage moulding material of the high temperature of displacement, with the situation of Figure 10 (promptly, before the initial stage moulding material is discharged in the discharge side 48) compare, the temperature of moulding material raises, i.e. T11＞T1, T12＞T2, T13＞T3.In addition, the difference of Tm, T13, T12, each temperature of T11 is also dwindled.Further, this moment to the pressure that exposes face 11 of each several part also with temperature similarly, any one is all than the state height of Figure 10, i.e. P11＞P1, P12＞P2, P13＞P3.

Therefore, as shown in figure 11, manufacturing method according to the invention because the initial stage moulding material is extruded in the discharge side 48, keep to joint expose face 11 fully the later stage moulding materials of heat and pressure can arrive vehicle roof decoration bar main part 10 expose face 11.Thus, on the composition surface 22 of exposing face 11 and end cap 20 of vehicle roof decoration bar main part 10, realize good engaging.

In addition, the initial stage moulding material adheres to the dust or the wet goods of forming cavity interior 40 sometimes, and this moment is if use the initial stage moulding material formation injection moulding portion that is attached with foreign matter, the then bond strength on composition surface reduction.But manufacturing method according to the invention because the initial stage moulding material is replaced into the later stage moulding material that does not adhere to dust or oil, realizes high bond strength.

And, when the moulding material of vehicle roof decoration bar main part 10 and the moulding material of end cap 20 do not have compatibility or lack compatibility, can be to the bond layer that face 11 is given the thermal activation type in advance that exposes that engages.Thus, the moulding material of the liquid state of fusion arrives and exposes face if heat, and then is formed on the bonding agent that exposes on the face and can be brought into play firm bonding force by the thermal activation of this moulding material.

So in forming cavity 40 behind the filling molding material, keep official hour (specifically this moulding material being crimped onto exposing under the state on the face 11 of vehicle roof decoration bar main part 10, cooling die 30 under packing state), make the forming polymer material cured in the forming cavity 40.

Solidify the mobile mold 34 in back and open mould, the end cap 20 that is formed in the forming cavity 40 is taken out from bed die 32 together with the moulding material that flows into discharge side 48 and throttling flow path portion 46.During taking-up, shift the back side of the end cap 20 of moulding onto, can easily release by the top that makes the distribution 54 (knockout) (with reference to Fig. 9) that the main body that connects bed die 32 is provided with.And, promote 54 and be separately positioned on forming cavity 40 and the discharge side 48, the moulding material that solidifies in each chamber can take out from bed die 32 simultaneously thus.

After the taking-up, separate and remove the projection forming part of part, solidifying corresponding to throttling flow path portion 46 and discharge side 48 by cut off waiting from end cap 20.Because throttling flow path portion 46 is arranged on the mould (bed die 32) with the side of forming cavity 40 forming mould (mold 34) subtend, the projection forming part of solidifying in the part corresponding to throttling flow path portion 46 is not connected with the outer surface of end cap 20.Therefore, as if the outstanding forming part of cutting off at the boundary member with end cap 20 corresponding to the part of above-mentioned throttling flow path portion 46, then excising vestige can't be visual from the outside, and does not remain on the visible position, thereby makes the vehicle roof decoration bar 1 of excellence attractive in appearance.

The vehicle roof decoration bar 1 that manufacture method by the invention described above is made, be injected into exposing on the face 11 of vehicle roof decoration bar main part 10 owing to have the later stage moulding material of sufficient heat and pressure, the later stage moulding material spreads all over to

head end

13a, 13b as the thinnest jut, so form the firm joint that does not have be full of cracks.Thus, obtain high-quality vehicle roof decoration bar 1.

In addition, as depicted in figs. 1 and 2, the shape of exposing face 11 of vehicle roof decoration bar main part 10 is identical with the shape on the composition surface 22 of end cap 20, and this boundary member forms from vehicle roof decoration bar main part 10 to the continuous even surface of end cap 20 sides.Thereby obtain the vehicle roof decoration bar 1 of the excellence attractive in appearance that vehicle roof decoration bar main part ora terminalis 17 and end cap ora terminalis 21 engage smoothly continuously.

More than, be that example is illustrated its manufacturing method and apparatus with vehicle roof decoration bar 1, but the invention is not restricted to present embodiment.For example, can make windowpane run channel 70 or car door opening fringing 90 etc. possess injection moulding portion in the part of moulding product various parts.Below, as these examples, the manufacture method of windowpane run channel 70 and car door opening fringing 90 is described.

As other suitable example of the moulding product that obtain by manufacture method of the present invention, can enumerate windowpane run channel 70.Figure 12 is the part stereogram by the windowpane run channel of one embodiment of the present invention manufacturing.The parts of windowpane run channel 70 (being also referred to as glass for vehicle window guide rail, guide groove, chute, glass for vehicle window plate guiding part etc.) for being assembled on the vehicle window frame on the upside of the door skin main bodys such as slip car door, front door, tail gate that are arranged on vehicle body.It is mounted on the windowpane run channel fitting recess of inside of vehicle body vehicle window frame, is used for the lifting of guide vehicle glass pane plate.

As shown in figure 12, the windowpane run channel 70 of present embodiment is to comprise having the roughly injection moulding portion 76 of L glyph shape, engages existing long shape first profiled part 72 of other moulding and the moulding product of existing long shape second profiled part 74 of moulding in addition at the two ends of the length direction of this injection moulding portion 76.In addition, in the windowpane run channel 70, have the bottom and form roughly U word, form at the outer side of the bottom side of two side portion and cooperate protuberance 77, form shielding protuberance 78, form sealing protuberance 79 at private side at the outer side of the raised sides of two side portion from the shape of cross section of the two side portion of width two lateral processes of bottom.

In the manufacture method of above-mentioned windowpane run channel 70, at first, the end of first profiled part 72 and second profiled part 74 is crossed as L font roughly each other under the state with extractor gauge sizing only and is placed on the assigned position in the injecting molding die.When closing injecting molding die, the end of length direction separately of first profiled part 72 and second profiled part 74 expose the part that face is formed into the forming surface of die cavity.In addition, can be corresponding to thin jut, promptly cooperate the projection forming part 80 that is provided with on the position of protuberance 77a～77d, shielding protuberance 78a～78d corresponding to discharge side (only on position, record discharge side among Figure 12 corresponding to 78a, but in case of necessity on corresponding to other the position of 77a～77d, 78b～78d too).

Then, to first profiled part 72 and second profiled part 74 respectively expose injecting forming material in the forming cavity between the face and moulding injection moulding portion 76, and engage first profiled part 72 and second profiled parts 74 by injection moulding portion 76.Thereby, connect first profiled part 72 and second profiled part 74, can moulding windowpane run channel 70.Other operation can be used the method identical with the manufacture method of above-mentioned vehicle roof decoration bar 1 (for example, preparing injecting molding die and Coinjection molding apparatus etc.).

And first profiled part 72 and second profiled part 74 that are connected with above-mentioned injection moulding portion 76 all are long material, the parts that can use extrusion modling by present use etc. to make.Further, even first profiled part 72 is mutual different shape with the shape of cross section (shape of exposing face) of second profiled part 74, have the injecting molding die that corresponds respectively to the forming cavity shape of respectively exposing face by use, also can make windowpane run channel 70.

In addition, other suitable example as the moulding product that obtain by manufacture method of the present invention, can enumerate the part of long shape first profiled part 92 is only excised given size in the longitudinal direction, connect the car door opening fringing 90 that face forms that exposes that forms by excising by injection moulding portion 94.Figure 13 is the part stereogram by the car door opening fringing of one embodiment of the present invention manufacturing.

As shown in figure 13, the car door opening fringing 90 of present embodiment is for being after the raw-material sealing protuberance 96 of linearity excises into given size in the longitudinal direction with extrusion modling, the state of L font is placed on the injecting molding die to bend to roughly with above-mentioned cut-out, the parts of the long shape that the sealing protuberance 96 that connects crooked corner portion by injection moulding portion 94 forms.Its shape of cross section is by the margination part 98 of U font roughly, form thin sealing protuberance 96 and keep protuberances 99 to form from this margination part 98 to four of inner projection to the outside from this margination part 98.In addition, on whole length directions of the inside of margination part 98, be embedded with the metallic core 93 that is used to keep form.

The manufacture method of above-mentioned car door opening fringing 90 is as follows.At first, to alongst only remove the length of regulation for the part of the sealing protuberance 96 in the corner portion of first profiled part 92 of the linearity of long shape with core 93 extrusion modlings, the margination part 98 of corner portion will be placed on the injecting molding die bending under the circular-arc state with the radius of curvature of stipulating.When closing injecting molding die, the sealing protuberance 96 that is removed of first profiled part 92 expose the part that face becomes the forming surface of forming cavity.In addition, at the thin jut in the face of exposing corresponding to profiled part, promptly expose the projection forming part 100 (only on position, record discharge side among Figure 13, but 96b too in case of necessity) that is provided with on the position of face 96a, 96b corresponding to discharge side corresponding to 96a corresponding to each of sealing protuberance 96.

Then, by the injection moulding portion 94 of injection moulding moulding sealing protuberance 96, and, can make car door opening fringing 90 thus with level and smooth junction surface by above-mentioned face 96a, the 96b of exposing of injection moulding portion 94 joints.And other operation can be used the method identical with the manufacture method of above-mentioned vehicle roof decoration bar 1.

Abovely concrete example of the present invention is had been described in detail, but these only are example that the scope to claim does not limit with reference to accompanying drawing.Comprise various distortion, the change that the above concrete example of enumerating is carried out in the technology of record in the scope of claim.

Claims

1, an a kind of part has the manufacture method of the moulding product of injection moulding portion, this method is for using the injecting molding die that can open and close that is formed with the forming cavity of regulation shape in inside, when opening this injecting molding die, first profiled part of other moulding is placed on the assigned position in the described injecting molding die, when closing this injecting molding die, the part of this first profiled part is exposed in this forming cavity, and keep making this expose the state of face as the part of the forming surface of this forming cavity, then, with heating and the thermoplastic polymer moulding material of the state of fusion is filled in this chamber from injection port injection, in moulding injection moulding portion, this of this injection moulding portion and this first profiled part exposed that face engages integratedly and the method for making the moulding product comprises following operation:

(a) as described injecting molding die, preparation is formed with in the inside of this mould along the direction of exposing the boundary face that face and described injection moulding portion engage of described first profiled part and the direction upper process that separates from described forming cavity, and the operation of the injecting molding die of the discharge side that is communicated with this forming cavity;

(b) will heat and the described moulding material of the liquid state of fusion is filled into the described forming cavity from described injection port injection with the injection pressure of regulation, the operation of the described injection moulding of moulding portion, wherein, make the initial stage arrive described boundary face at least corresponding to the initial stage moulding material of the ormal weight that exposes face of the part of described discharge side, flow in the described discharge side and discharge this later stage moulding material displacement of comparing the low state of temperature height and viscosity with this initial stage moulding material of the part of the initial stage moulding material that this is discharged from by compare injection pressure that the time goes up the later stage moulding material of back injection with the injection of this initial stage moulding material;

(c) keep official hour making described later stage moulding material be crimped onto exposing under the state on the face of described first profiled part, make the pressure of this later stage moulding material and/or hotwork be used for this and expose face, the operation of the described injection moulding portion that engages on the face that this later stage moulding material forms in exposing of this first profiled part; And

2, manufacture method according to claim 1, wherein, described discharge side is communicated with described forming cavity by the throttling flow path portion, and generation is accompanied by the shear heat of shearing the described initial stage moulding material of discharging by this throttling flow path portion.

3, manufacture method according to claim 1 and 2, wherein, the forming polymer material that use can be applied with the described first profiled part hot melt is as the moulding material of described injection moulding portion, by hot melt apply engage described first profiled part expose face and this injection moulding portion.

4, manufacture method according to claim 3, wherein, described first profiled part is by at least a moulding that is selected from rubber, olefines synthetic resin, olefin hydrocarbons thermoplasticity elastic body and the styrene analog thermoplastic elastomer,

Use olefines synthetic resin or olefin hydrocarbons thermoplasticity elastic body moulding material as described injection moulding portion.

5, manufacture method according to claim 1 wherein, is used at described described first profiled part that is pre-formed thermal activation type bond layer on the face that exposes.

6, manufacture method according to claim 1, wherein, second profiled part that will be different with described first profiled part is placed under the state that separates from this first profiled part on the assigned position in the described injecting molding die, when closing described injecting molding die, at least a portion of this second profiled part is exposed in this forming cavity, and keep this is exposed the state of face as the part of the forming surface of this forming cavity

In respectively exposing between the face in the described injection moulding of the moulding portion of described first profiled part and second profiled part, connect described first profiled part and second profiled part by this injection moulding portion thus with this injection moulding portion and two components bonding.

7, manufacture method according to claim 6, wherein, described first profiled part and described second profiled part have the difform face that exposes mutually.

8, according to claim 6 or 7 described manufacture methods, wherein, described first profiled part and described second profiled part all are long material, and are being formed with the described face that exposes on the length direction end separately.

9, according to claim 6 or 7 described manufacture methods, wherein, described first profiled part and described second profiled part are placed to the described separated from one another and face direction that respectively expose face of face of exposing and intersect, and by this injection moulding portion described first profiled part and second profiled part are connected into the L font in the time of the injection moulding portion of moulding L font.

10, manufacture method according to claim 1, wherein, described first profiled part is long material, only remove alongst specific length by the part of first profiled part that will grow, the part of this first profiled part is divided into two, and form and alongst to keep two of the predetermined distance subtend to expose face, expose the described injection moulding of moulding portion between the face, and connect described two of first profiled part by this injection moulding portion and expose face at these two.

11, manufacture method according to claim 1, wherein, that uses polymeric material system is squeezed into section bar as described first profiled part.

12, a kind of injecting molding die, this injecting molding die can open and close, and forms the forming cavity of regulation shape when closing in inside, wherein,

This injecting molding die can be placed into first profiled part of other moulding on the assigned position when opening, the part of first profiled part of described placement is exposed in this forming cavity and under this exposes face and become the state of a part of forming surface of this forming cavity, this first profiled part can be fixed

Described injecting molding die comprises: to along the direction of exposing face of described first profiled part and the direction upper process that separates from described forming cavity, and the discharge side that is communicated with this forming cavity; The thermoplastic polymer moulding material of the state of fusion is expelled to the injection port in the described forming cavity with heating, when this injection port is injected described forming polymer material, can make the initial stage arrive in the initial stage moulding material of the described ormal weight that exposes face at least corresponding to the initial stage moulding material of the part of described discharge side, flow in the described discharge side and discharge this later stage moulding material displacement of comparing the low state of temperature height and viscosity with this initial stage moulding material of the part of the initial stage moulding material that this is discharged from by compare injection pressure that the time goes up the later stage moulding material of back injection with the injection of this initial stage moulding material.

13, injecting molding die according to claim 12 wherein, is provided with the block that exposes the face butt with described first profiled part.

14, according to claim 12 or 13 described injecting molding dies, wherein, described discharge side be communicated with corresponding to the injection moulding portion of moulding in described forming cavity in other parts compare the cavity segment that is shaped to thin part and dispose.

15, injecting molding die according to claim 12, wherein, described discharge side forms open the taper that direction side broaden of internal perisporium at mould.

16, injecting molding die according to claim 12, wherein, described discharge side is communicated with this forming cavity by relative with described discharge side phase specific volume little throttling flow path portion with described forming cavity.

17, injecting molding die according to claim 16, wherein, the sectional area vertical with this flow direction in the described discharge side of sectional area ratio of the direction that the flow direction with described moulding material in the described throttling flow path portion is vertical is little.

18, according to claim 16 or 17 described injecting molding dies, wherein, described throttling flow path portion is formed on when closing described injecting molding die on the mould with the side of the mould subtend that forms described forming cavity.

19, a kind of manufacturing installation, this device is for using the injecting molding die that can open and close that is formed with the forming cavity of regulation shape in inside, when opening this injecting molding die, place first profiled part of other moulding, when closing this injecting molding die, the part of this first profiled part is exposed in this forming cavity, and keep making this expose the state of face as the part of the forming surface of this forming cavity, then, with heating and the forming polymer material of the state of fusion is filled in this forming cavity from injection port injection, in moulding injection moulding portion, this of this injection moulding portion and this first profiled part exposed that face engages integratedly and the device of making the moulding product, wherein, this device comprises:

The described injecting molding die of claim 12; With

Be expelled in the described forming cavity to the forming polymer material of molten condition and be arranged on injection port on the described injecting molding die, supply with the moulding material feed unit of the forming polymer material of this molten condition in order to heat.

20, a kind of moulding product being fabricated to feature by the described manufacture method of claim 1, and engaging integratedly on the part of first profiled part of moulding in addition the injection moulding portion that obtains by injection moulding are arranged.

21, moulding product according to claim 20, wherein, in the bonding part of described first profiled part and described injection moulding portion, the shape on the composition surface of described first profiled part is identical with the shape on the composition surface of described injection moulding portion.

22, according to claim 20 or 21 described moulding product, wherein, the boundary member of described first profiled part and described injection moulding portion has formed from this first profiled part side to the continuous even surface of this injection moulding portion side.

23, moulding product according to claim 20, wherein, described first profiled part of described moulding product engages with uniform bond strength with whole composition surfaces of described injection moulding portion.

24, moulding product according to claim 20, wherein, described first profiled part has the part of attenuation and projection at least a portion of shape of cross section.